16231231999 has 16 divisors (see below), whose sum is σ = 16927128576. Its totient is φ = 15546384000.

The previous prime is 16231231957. The next prime is 16231232023. The reversal of 16231231999 is 99913213261.

It is a cyclic number.

It is not a de Polignac number, because 16231231999 - 2¹⁷ = 16231100927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16231237999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5793399 + ... + 5796199.

It is an arithmetic number, because the mean of its divisors is an integer number (1057945536).

Almost surely, 2^16231231999 is an apocalyptic number.

16231231999 is a deficient number, since it is larger than the sum of its proper divisors (695896577).

16231231999 is a wasteful number, since it uses less digits than its factorization.

16231231999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4686.

The product of its digits is 157464, while the sum is 46.

The spelling of 16231231999 in words is "sixteen billion, two hundred thirty-one million, two hundred thirty-one thousand, nine hundred ninety-nine".